TSPY_ZBOT.ZYB

This spyware is injected into all running processes to remain memory resident.

It attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

Infection Points

This spyware arrives as a file downloaded from the following URLs:

• http://{BLOCKED}sein.net/22oct_pac.exe

Installation

This spyware drops the following files:

• %Application Data%\{random1}\{random}.exe - copy of itself
• %Application Data%\{random2}\{random}.{random} - contains encrypted stolen data

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It creates the following folders:

• %Application Data%\{random1}
• %Application Data%\{random2}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It is injected into all running processes to remain memory resident.

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{GUID of mount point of %Windows%} = %Application Data%\{random1}\{malware filename}.exe

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
{random}

It creates the following registry entry(ies) to bypass Windows Firewall:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Windows%\explorer.exe = %Windows%\explorer.exe:*:Enabled:Windows Explorer

Information Theft

This spyware accesses the following site to download its configuration file:

• http://{BLOCKED}adus.cc/22oct_pac.cpm

It attempts to access a website to download a file which contains information where the Trojan can download an updated copy of itself, and where to send its stolen data. This configuration file also contains the following list of targeted bank-related websites from which it steals information:

• *.barclays.co.uk*bg.php*
• http://www.barclayscouk.cc/barc/bg.php
• *.barclays.co.uk*barcaz.php*
• http://www.barclayscouk.cc/js/barcaz.js
• *nwolb.co*bg.php*
• http://www.nwolb.co.uk.servat.cc/natwest/bg.php
• *nwolb.co*az.php*
• http://www.nwolb.co.uk.servat.cc/js/natwestaz.js
• *hsbc.co.uk*bg.php*
• http://www.nsvc.cc/hsbc/bg.php
• *hsbc.co.uk*az.php*
• http://www.nsvc.cc/az.js
• *alliance*leicester.co.uk*bg.php*
• http://www.mybank.alliance-leiceter.cc/leicester/bg.php
• *alliance*leicester.co.uk*leicesteraz.php*
• http://www.mybank.alliance-leiceter.cc/js/leicesteraz.js
• *firstdirect.com*bg.php*
• http://www1.banking.firstdirest.cc/first/bg.php
• *firstdirect.com*firstaz.php*
• http://www1.banking.firstdirest.cc/js/firstaz.js
• *abbeynational.co.uk*abbeyaz.*php*
• http://myonlineaccounts2.abbeynational.servat.cc/js/abbeyaz.js
• *abbeynational.co.uk*bg.php*
• http://myonlineaccounts2.abbeynational.servat.cc/abbey/bg.php
• *retail.abbeynational.co.uk/EBAN_ENS/BtoChannelDriver.ssobto*
• *.abbeynational.co.uk/*
• *.barclays.co.uk*
• *nwolb.co*
• *.mybank.alliance-leicester.co.uk*
• *.firstdirect.com*splash*trusteer*
• *.firstdirect.com/1/2/*
• *.hsbc.co.uk/1*

It attempts to steal information from the following banks and/or other financial institutions:

• Abbey National
• Alliance & Leicester
• Barclays
• First Direct
• HSBC
• Natwest

Stolen Information

This spyware sends the gathered information via HTTP POST to the following URL:

• http://{BLOCKED}cyis.com/yahooman.php

Other Details

This spyware does the following:

• Inserts JavaScript (JS) code in the web pages to retrieve user names, passwords, and security codes used in a two-factor authentication in order to transact from within the website.

Variant Information

This spyware has the following MD5 hashes:

• bbeb87f5b3b7c4900e7d5de3d344ffbb

It has the following SHA1 hashes:

• 21c4be93b521f3a90bd78634bdbf4983fa11aa5c